Page last updated at 08:49 GMT, Sunday, 8 November 2009

Digging a tunnel from West to East

The infamous "Tunnel 57" gained its name as it was used to smuggle 57 people from East to West Berlin before it was discovered in 1964.

Twenty years on from the fall of the Berlin Wall, one of the men involved in the undercover operation describes how the tunnel was dug.

READ MORE: 1989 - Europe's revolution


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